. >> reporter: after the 2009 shooting, officer grahams was captured in this video, police charged with racial bias and excessive force. n.o.b.l.e. found plenty of things to change. >> many outdated policies in the organization, and there was not sufficient supervision or accountability. >> reporter: today noble says the b.a.r.t. police followed most of their 55 recommendations including a system to identify problem officers early. >> if the officer has st.s complaints or if an officer is late to work. >> reporter: of course changing a culture is tough. this last may there was the naked acrobat. officers took a painfully long time to show up. b.a.r.t. now has additional training to deal with the mentally ill and gone from 24 to 40 hours a year of training on force. most passengers did not notice either way. >> i don't have any encounters. i don't haven in opinion about it. >> reporter: others are thankful. >> when you're in trouble, who do you call? the police! >> reporter: others do not trust them no matter what. >> i never did, from the beginning. i'm from east oakland. you know what